Magnetic proximity effect in Pr₀.₅Ca₀.₅MnO₃/La₀.₇Sr₀.₃MnO₃ bilayered films
The magnetotransport properties of Pr₀.₅Ca₀.₅MnO₃/La₀.₇Sr₀.₃MnO₃ bilayer, and Pr₀.₅Ca₀.₅MnO₃ and La₀.₇Sr₀.₃MnO₃ films, deposited on LaAlO₃ (001) substrate by pulse laser deposition have been investigated. The x-ray diffraction and high-resolution electron-microscopy analysis reveals that lattice...
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| Datum: | 2012 |
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| Hauptverfasser: | , , , , , , , |
| Format: | Artikel |
| Sprache: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2012
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| Schriftenreihe: | Физика низких температур |
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| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/116770 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Magnetic proximity effect in Pr₀.₅Ca₀.₅MnO₃/La₀.₇Sr₀.₃MnO₃ bilayered films / V.G. Prokhorov, G.G. Kaminsky, V.S. Flis, J.M. Kim, T.W. Eom, J.S. Park, Y.P. Lee, V.L. Svetchnikov // Физика низких температур. — 2012. — Т. 38, № 1. — С. 52-61. — Бібліогр.: 44 назв. — рос. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | The magnetotransport properties of Pr₀.₅Ca₀.₅MnO₃/La₀.₇Sr₀.₃MnO₃ bilayer, and Pr₀.₅Ca₀.₅MnO₃ and
La₀.₇Sr₀.₃MnO₃ films, deposited on LaAlO₃ (001) substrate by pulse laser deposition have been investigated.
The x-ray diffraction and high-resolution electron-microscopy analysis reveals that lattice parameters for the
constituent sublayers in the bilayer are very close to that for the individual films. It was found that a ferromagnetic
transition in the La₀.₇Sr₀.₃MnO₃ sublayer significantly modifies the magnetotransport properties of the
Pr₀.₅Ca₀.₅MnO₃ constituent sublayer, owing to occurrence of a magnetic proximity effect. The main evidences
for this effect are an appearance of the exchange bias interaction between the constituent sublayers; a localizedto-itinerant
crossover in the system of polarized electrons, which results in formation of the Griffiths-like ferromagnetic
state; and an unusual polaron transport of carriers. The experimental results have been analyzed within
the framework of modern theoretical approaches. |
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